CVE-2026-118653

CVE-2026-118653 · Echo: Rate Limiter Bypass via Spoofed X-Forwarded-For Header in Default Configuration

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Echo is a Go web framework. From 4.0.0 until 5.1.0, Context.RealIP falls back to client-supplied X-Forwarded-For or X-Real-IP values when Echo.IPExtractor is unset, and the default RateLimiter uses that result as its client identifier. A remote attacker can rotate arbitrary forwarded-address values to obtain new rate-limit buckets and bypass IP-based throttling used for controls such as brute-force or request-volume protection. This issue is fixed in Echo v5.1.0.

CVSS 5.3 · Medium · EPSS 0.4%

Published

2026-10-28T19:42:05.556Z

Updated

2026-10-28T19:42:05.556Z

Stack: system

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